网上的很多PHP支付宝支付接入教程都颇为复杂，且需要配置和引入较多的文件，本人通过整理后给出一个单文件版的，希望可以给各位想接入支付宝支付的带来些许帮助和借鉴意义。本文我们就和大家分享关于一个PHP文件搞定支付宝系列之电脑网站支付教程知识，希望能帮助到大家。

环境依赖

PHP5.0以上，且需要开启CURL服务、SSL服务。

注意事项

1.文件开头的配置信息必须完善
2.商户私钥需填写对应签名算法类型的私钥，如何生成密钥参考：
2.1 https://docs.open.alipay.com/…
2.2 https://docs.open.alipay.com/…

代码

<?phpheader('Content-type:text/html; Charset=utf-8');$appid = 'xxxxx';  //https://open.alipay.com 账户中心->密钥管理->开放平台密钥，填写添加了电脑网站支付的应用的APPID$returnUrl = 'http://www.xxx.com/alipay/return.php';     //付款成功后的同步回调地址$notifyUrl = 'http://www.xxx.com/alipay/notify.php';     //付款成功后的异步回调地址$outTradeNo = uniqid();     //你自己的商品订单<em>￥本文来%源[email protected]搞@^&代*@码)网5</em><strong>搞gaodaima代码</strong>号$payAmount = 0.01;          //付款金额，单位:元$orderName = '支付测试';    //订单标题$signType = 'RSA2';       //签名算法类型，支持RSA2和RSA，推荐使用RSA2//商户私钥，填写对应签名算法类型的私钥，如何生成密钥参考：https://docs.open.alipay.com/291/105971和https://docs.open.alipay.com/200/105310$saPrivateKey='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';$aliPay = new AlipayService($appid,$returnUrl,$notifyUrl,$saPrivateKey);$sHtml = $aliPay->doPay($payAmount,$outTradeNo,$orderName,$returnUrl,$notifyUrl);echo $sHtml;class AlipayService{    protected $appId;    protected $returnUrl;    protected $notifyUrl;    protected $charset;    //私钥值    protected $rsaPrivateKey;    public function __construct($appid, $returnUrl, $notifyUrl,$saPrivateKey)    {        $this->appId = $appid;        $this->returnUrl = $returnUrl;        $this->notifyUrl = $notifyUrl;        $this->charset = 'utf8';        $this->rsaPrivateKey=$saPrivateKey;    }    /**     * 发起订单     * @param float $totalFee 收款总费用 单位元     * @param string $outTradeNo 唯一的订单号     * @param string $orderName 订单名称     * @param string $notifyUrl 支付结果通知url 不要有问号     * @param string $timestamp 订单发起时间     * @return array     */    public function doPay($totalFee, $outTradeNo, $orderName, $returnUrl,$notifyUrl)    {        //请求参数        $requestConfigs = array(            'out_trade_no'=>$outTradeNo,            'product_code'=>'FAST_INSTANT_TRADE_PAY',            'total_amount'=>$totalFee, //单位 元            'subject'=>$orderName,  //订单标题        );        $commonConfigs = array(            //公共参数            'app_id' => $this->appId,            'method' => 'alipay.trade.page.pay',             //接口名称            'format' => 'JSON',            'return_url' => $returnUrl,            'charset'=>$this->charset,            'sign_type'=>'RSA2',            'timestamp'=>date('Y-m-d H:i:s'),            'version'=>'1.0',            'notify_url' => $notifyUrl,            'biz_content'=>json_encode($requestConfigs),        );        $commonConfigs["sign"] = $this->generateSign($commonConfigs, $commonConfigs['sign_type']);        return $this->buildRequestForm($commonConfigs);    }    /**     * 建立请求，以表单HTML形式构造（默认）     * @param $para_temp 请求参数数组     * @return 提交表单HTML文本     */    protected function buildRequestForm($para_temp) {        $sHtml = "<form id='alipaysubmit' name='alipaysubmit' action='https://openapi.alipay.com/gateway.do?charset=".$this->charset."' method='POST'>";        while (list ($key, $val) = each ($para_temp)) {            if (false === $this->checkEmpty($val)) {                $val = str_replace("'","&apos;",$val);                $sHtml.= "<input type='hidden' name='".$key."' value='".$val."'/>";            }        }        //submit按钮控件请不要含有name属性        $sHtml = $sHtml."<input type='submit' value='ok' style='display:none;''></form>";        $sHtml = $sHtml."<script>document.forms['alipaysubmit'].submit();</script>";        return $sHtml;    }    public function generateSign($params, $signType = "RSA") {        return $this->sign($this->getSignContent($params), $signType);    }    protected function sign($data, $signType = "RSA") {        $priKey=$this->rsaPrivateKey;        $res = "-----BEGIN RSA PRIVATE KEY-----\n" .            wordwrap($priKey, 64, "\n", true) .            "\n-----END RSA PRIVATE KEY-----";        ($res) or die('您使用的私钥格式错误，请检查RSA私钥配置');        if ("RSA2" == $signType) {            openssl_sign($data, $sign, $res, version_compare(PHP_VERSION,'5.4.0', '<') ? SHA256 : OPENSSL_ALGO_SHA256); //OPENSSL_ALGO_SHA256是php5.4.8以上版本才支持        } else {            openssl_sign($data, $sign, $res);        }        $sign = base64_encode($sign);        return $sign;    }    /**     * 校验$value是否非空     *  if not set ,return true;     *    if is null , return true;     **/    protected function checkEmpty($value) {        if (!isset($value))            return true;        if ($value === null)            return true;        if (trim($value) === "")            return true;        return false;    }    public function getSignContent($params) {        ksort($params);        $stringToBeSigned = "";        $i = 0;        foreach ($params as $k => $v) {            if (false === $this->checkEmpty($v) && "@" != substr($v, 0, 1)) {                // 转换成目标字符集                $v = $this->characet($v, $this->charset);                if ($i == 0) {                    $stringToBeSigned .= "$k" . "=" . "$v";                } else {                    $stringToBeSigned .= "&" . "$k" . "=" . "$v";                }                $i++;            }        }        unset ($k, $v);        return $stringToBeSigned;    }    /**     * 转换字符集编码     * @param $data     * @param $targetCharset     * @return string     */    function characet($data, $targetCharset) {        if (!empty($data)) {            $fileType = $this->charset;            if (strcasecmp($fileType, $targetCharset) != 0) {                $data = mb_convert_encoding($data, $targetCharset, $fileType);                //$data = iconv($fileType, $targetCharset.'//IGNORE', $data);            }        }        return $data;    }}

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